Question 1196105
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Imagine 3 dominoes labeled A,B,C


The notation A→B can be thought of as domino A falling to knock down domino B
I.e. "A knocks down B"
or "A leads to B"


Then B→C means "B knocks down C"


The two events (A→B)&(B→C) chain together to mean: "A knocks down B" and "B knocks down C"
Rephrased: "A leads to B leads to C"


We can then cut out the middleman and conclude that knocking down A ultimately leads to C falling, which gives us A→C


This process can be extended to more than 3 terms.


For more information, check out the transitive property. 
A similar related idea is the term "syllogism" found in logic class. More specifically its often called a "hypothetical syllogism"


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A real world example:
A = it rains
B = the roads get wet
C = there's a higher chance of an accident


Premise1: (A→B) = If it rains, then the roads get wet
Premise2: (B→C) = If the roads get wet, then there's a higher chance of an accident
Conclusion: (A→C) = If it rains, then there's a higher chance of an accident
Event A causes event B which in turn leads to event C.
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